Thiouronium salt as anti-reversion agent in a vulcanizable rubber composition and tire based on such a composition

摘要

A rubber composition based on at least (i) an elastomer, (ii) a reinforcing filler and (iii) a thiouronium salt or an analogue of a thiouronium salt of the formula (I) below: <?in-line-formulae description="In-line Formulae" end="lead"?>A-S-Y-S-A (I)<?in-line-formulae description="In-line Formulae" end="tail"?> in which, A represents a group associated respectively with a molecule HX or an ion X-, X denoting a halogen atom and Z denoting Incorporating the thiouronium salt into the vulcanizable rubber composition makes it possible to substantially reduce the reversion rate of the vulcanized rubber composition.